<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <link rel="stylesheet" href="./css/em.css" />
  </head>
  <body>
    <div class="parent">
      parent
      <div class="father">
        father
        <div class="child">child</div>
      </div>
    </div>


    
    <div class="p1">
      <div class="s1">1</div>
      <div class="s2">1</div>
    </div>
    <div class="p2">
      <div class="s5">1</div>
      <div class="s6">1</div>
    </div>
  </body>
</html>
